257086 has 8 divisors (see below), whose sum is σ = 388224. Its totient is φ = 127680.

The previous prime is 257077. The next prime is 257093. The reversal of 257086 is 680752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×257086² = 132186422792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46 + ... + 718.

It is an arithmetic number, because the mean of its divisors is an integer number (48528).

2²⁵⁷⁰⁸⁶ is an apocalyptic number.

257086 is a deficient number, since it is larger than the sum of its proper divisors (131138).

257086 is a wasteful number, since it uses less digits than its factorization.

257086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 257086 is about 507.0364878389. The cubic root of 257086 is about 63.5857027842.

The spelling of 257086 in words is "two hundred fifty-seven thousand, eighty-six".